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Anonymous users2024-02-06Ohm's Law! The relationship between current, voltage, and resistance: i=u r u=ir r=u i
On the premise that the power has been set! The current is equal to the voltage divided by the resistance! The voltage is equal to the current multiplied by the resistance! Resistance is equal to voltage divided by current!
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Anonymous users2024-02-05The relationship between current, voltage and resistance is Ohm's law! If it's not clear, you can look for a physics book in junior high school.
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Anonymous users2024-02-04The principle of the relationship between current and voltage and resistance.
We know that voltage is what causes the current to be generated, and we can think that the higher the voltage, the greater the current may be, and we also know that the resistance represents the resistance of the conductor to the current, and the greater the resistance, the smaller the current will be
Knowing the relationship between current and voltage and resistance is research.
The key to studying and analyzing various circuits is a very important problem in electricity For specific small experiments, you can look at the library.
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Anonymous users2024-02-03In the case of normal temperature and pressure, it is the relationship of Ohm's law: that is, voltage = current x resistance, or current = voltage resistance, resistance = voltage and current. However, in the case of superconductivity, the above is not true.
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Anonymous users2024-02-02In the same wire, the current is directly proportional to the voltage and the current is inversely proportional to the resistance.
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Anonymous users2024-02-01Their relationship is expressed by the formula: u=i*r;
The current is directly proportional to the magnitude of the voltage and inversely proportional to the magnitude of the resistance.
When the voltage is constant, the resistance increases, the current decreases, and the resistance decreases, and the current increases.
When the resistance is constant, the voltage increases, the current increases, and the voltage decreases, and the current decreases;
When the current is constant, the voltage and resistance are also fixed.
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Anonymous users2024-01-31The relationship between resistance (r), voltage (v), and current (i) can be described by Ohm's law. According to Ohm's law, the relationship between resistance, voltage, and current can be expressed as:
v = i * r
where V is the voltage (in volts, V), I is the current (in amps, A), and R is the resistance (in ohms).
This formula illustrates the linear relationship between voltage, current, and resistance. Specifically, voltage is the difference in potential produced by the passage of current through a resistor. Resistance determines the magnitude of the current passing through it, i.e., the proportional relationship between current and voltage.
When the resistance value is fixed, the increase in voltage leads to an increase in the current.
In addition, according to the inference relation of Ohm's law, we can also get:
r = v / i
This formula states that resistance is equal to the ratio of voltage to current. When we know the values of voltage and current, we can use this formula to calculate the magnitude of the resistance.
In summary, the relationship between resistance, voltage, and current is described by Ohm's law, and there is a sexual relationship between them, which can be expressed by v = i * r or r = v i.
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Anonymous users2024-01-30Proportional relationship. Ou Yuanzhen discovered that the relationship between current, voltage, and resistance is proportional, which is the famous Ohm's law; Ohm also proved that the resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area and conductivity, and that in the case of a stable current, the charge moves not only on the surface of the conductor but also over the entire section of the conductor.
Significance of Ohm's Law:
Ohm's law is an important law of electricity and is the backbone knowledge that makes up the content of electricity. Ohm's law is not only theoretical, very important, but also very widely used in practical applications, and the application of Ohm's law to people's work and life, to analyze simple electrical phenomena in life, is an important way to realize the connection between theory and practice. In the same circuit, the current through a conductor is proportional to the voltage across the conductor and inversely proportional to the resistance of the conductor.
Solve specific problems in the circuit. When Ohm's law is established, the curve made by taking the voltage at both ends of the conductor as the abscissa and the current i in the conductor as the ordinate is called the volt-ampere characteristic curve. This is a straight line through the origin of the coordinates, and its slope is the reciprocal of the resistance.
Electrical components with this property are called linear components, and their resistance is called linear resistance hail bury hand or ohmic resistance. <>
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Anonymous users2024-01-29Ohm's law i = u r, or u = ir.
The relationship between resistance, voltage, and current is Ohm's law i=u r, or u=ir.
In words, when the resistance is constant, the current flowing through the conductor is proportional to the voltage at both ends of the conductor; When the voltage at both ends of the conductor is constant, the current flowing through the conductor is inversely proportional to the conductor resistance.
In physics, resistance indicates the magnitude of the resistance of the conductor to the current, and the greater the resistance of the conductor, the greater the resistance of the conductor to the current. Different conductors, the resistance is generally different, and resistance is a property of the conductor itself. Or a sparrow.
Resistance Influencing Factors:
Length: When the material and cross-sectional area are the same, the longer the length of the conductor, the greater the resistance.
Cross-sectional area: When the material and length are the same, the smaller the cross-sectional area of the conductor, the greater the resistance.
Materials: When the length and cross-sectional area are the same, the conductor resistance of different materials is different.
Temperature: For most conductors, the higher the temperature, the greater the resistance, such as metals, etc.; For a few conductors, the higher the temperature, the lower the resistance, such as carbon.
Resistance is a property of the conductor itself, so the resistance of the conductor has nothing to do with whether the conductor is connected to the circuit, whether there is an early current in the conductor, the magnitude of the current, and other factors. The resistivity of a superconductor is zero, so the resistance of a superconductor is zero. <>
Generally, the current flowing through the optocoupler light-emitting tube can be calculated by selecting the resistance of 3-10mA. The second problem is that if the number of optocouplers is small (no more than 5 and the parameters must be the same), it can work, but it is not recommended to connect this way, because it may be problematic to open at the same time. >>>More
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According to the conclusion of the experiment: at the moment of power failure, the current in the self-inductance coil always disappears from the original current, then the maximum self-induced electromotive force should be equal to the original current multiplied by the load, that is, the larger the load, the greater the self-induced electromotive force will be. From the self-induced electromotive force e=l*δi δt, it can be seen that the faster the current changes, the faster the energy loss. >>>More